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Twisted Polytope Sheaves and Coherent-Constructible Correspondence for Toric Varieties

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arxiv 1701.00689 v1 pith:WBQZUP4E submitted 2017-01-03 math.AG math.DG

classification math.AGmath.DG
keywords sheavessigmatoriccategorycitederivedpolytopeprojective
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abstract

Given a smooth projective toric variety $X_\Sigma$ of complex dimension $n$, Fang-Liu-Treumann-Zaslow \cite{FLTZ} showed that there is a quasi-embedding of the differential graded (dg) derived category of coherent sheaves $Coh(X_\Sigma)$ into the dg derived category of constructible sheaves on a torus $Sh(T^n, \Lambda_\Sigma)$. Recently, Kuwagaki \cite{Ku2} proved that the quasi-embedding is a quasi-equivalence, and generalized the result to toric stacks. Here we give a different proof in the smooth projective case, using non-characteristic deformation of sheaves to find twisted polytope sheaves that co-represent the stalk functors.

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  1. Line Bundle Resolutions via the Coherent-Constructible Correspondence

    math.AG 2024-11 accept novelty 6.0 of 10

    On smooth projective toric varieties, every coherent sheaf has a minimal line bundle resolution of length at most the dimension, and for toric subvarieties the Betti numbers are compactly supported cohomology groups o...

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